What Just Happened at AZ Show?

They were about 35 minutes into their set and stormed off the stage rather quickly. Not sure if there were technical difficulties or something else? Their set was going really well and they had the crowd in a trance… disappointed.

Update Thanks for all of your responses, you guys are all awesome! I see now that I am just an uninitiated new fan! Their set was awesome and super entrancing. I sincerely appreciate everyone letting me know the inside scoop! P.S. deftones rocked the fucking house!